Annual report pursuant to Section 13 and 15(d)

Stockholders' Equity (Details Textual)

v2.4.1.9
Stockholders' Equity (Details Textual) (USD $)
 12 Months Ended 0 Months Ended 1 Months Ended 0 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Jan. 18, 2013
Jan. 31, 2013
Apr. 25, 2014
Dec. 31, 2011
Oct. 09, 2013
May 31, 2014
Aug. 31, 2014
Additional Stockholder's Equity (Textual) [Abstract]                    
Common stock, par value (in dollars per share) $ 0.001us-gaap_CommonStockParOrStatedValuePerShare $ 0.001us-gaap_CommonStockParOrStatedValuePerShare                
Common stock, shares authorized (up to 9,000,000,000) 9,000,000,000us-gaap_CommonStockSharesAuthorized 9,000,000,000us-gaap_CommonStockSharesAuthorized                
Common stock, shares issued (in shares) 5,653,529,403us-gaap_CommonStockSharesIssued 6,096,220,526us-gaap_CommonStockSharesIssued                
Common stock, shares outstanding 5,646,119,122us-gaap_CommonStockSharesOutstanding 6,096,220,526us-gaap_CommonStockSharesOutstanding                
Common stock reserved for issuance 296,096,000us-gaap_CommonStockCapitalSharesReservedForFutureIssuance                  
Number of shares repurchased 1,259,274,498siri_StockRepurchaseProgramNumberofSharesRepurchased                  
Aggregate cost for shares repurchased $ 4,285,192,000siri_ShareRepurchaseProgramSharesRepurchasedCost                  
Remaining amount authorized under the stock repurchase program 1,714,808,000us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1                  
Treasury stock 26,034,000us-gaap_TreasuryStockValue 0us-gaap_TreasuryStockValue                
Loss on change in value of derivatives 34,485,000us-gaap_GainLossOnDerivativeInstrumentsNetPretax 20,393,000us-gaap_GainLossOnDerivativeInstrumentsNetPretax 0us-gaap_GainLossOnDerivativeInstrumentsNetPretax              
Amortization of costs related to share-lending arrangement and other issuance costs 12,701,000siri_AmortizationOfCostsRelatedToShareLendingArrangementAndOtherIssuanceCosts 12,745,000siri_AmortizationOfCostsRelatedToShareLendingArrangementAndOtherIssuanceCosts 12,402,000siri_AmortizationOfCostsRelatedToShareLendingArrangementAndOtherIssuanceCosts              
Unamortized, debt issuance costs   12,701,000us-gaap_UnamortizedDebtIssuanceExpense                
Preferred stock, par value (in dollars per share) $ 0.001us-gaap_PreferredStockParOrStatedValuePerShare $ 0.001us-gaap_PreferredStockParOrStatedValuePerShare                
Undesignated preferred stock, shares authorized 50,000,000us-gaap_PreferredStockSharesAuthorized 50,000,000us-gaap_PreferredStockSharesAuthorized                
Preferred stock, shares issued 0us-gaap_PreferredStockSharesIssued 0us-gaap_PreferredStockSharesIssued                
Preferred stock, shares outstanding 0us-gaap_PreferredStockSharesOutstanding 0us-gaap_PreferredStockSharesOutstanding                
Number of warrants exercised (in shares) 1,788,000siri_ClassofWarrantorRightWarrantsExercisedDuringPeriod                  
Warrants outstanding 16,667,000us-gaap_ClassOfWarrantOrRightOutstanding 18,455,000us-gaap_ClassOfWarrantOrRightOutstanding                
Weighted average exercise price on outstanding warrants $ 2.50us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1 $ 2.55us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1                
Warrant expenses 0siri_ClassofWarrantorRightExpenseRecognized 0siri_ClassofWarrantorRightExpenseRecognized 0siri_ClassofWarrantorRightExpenseRecognized              
Other Current Assets [Member]                    
Additional Stockholder's Equity (Textual) [Abstract]                    
Unamortized, debt issuance costs   12,423,000us-gaap_UnamortizedDebtIssuanceExpense
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherCurrentAssetsMember 		               
Related Party Current Assets [Member]                    
Additional Stockholder's Equity (Textual) [Abstract]                    
Unamortized, debt issuance costs   278,000us-gaap_UnamortizedDebtIssuanceExpense
/ us-gaap_BalanceSheetLocationAxis
= siri_RelatedPartyCurrentAssetsMember 		               
Liberty Media [Member]                    
Additional Stockholder's Equity (Textual) [Abstract]                    
Loss on change in value of derivatives 34,485,000us-gaap_GainLossOnDerivativeInstrumentsNetPretax
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= siri_LibertyMediaMember 		20,393,000us-gaap_GainLossOnDerivativeInstrumentsNetPretax
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= siri_LibertyMediaMember 		               
Common Stock [Member]                    
Additional Stockholder's Equity (Textual) [Abstract]                    
Common stock, shares issued (in shares) 5,653,529,403us-gaap_CommonStockSharesIssued
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember 		6,096,220,526us-gaap_CommonStockSharesIssued
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember 		5,262,440,085us-gaap_CommonStockSharesIssued
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember 		      3,753,201,929us-gaap_CommonStockSharesIssued
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember 		     
Conversion of preferred stock to common stock (in shares)   1,293,509,076us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember 		1,293,467,684us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember 		             
Issuance of common stock upon exercise of warrants (in shares) 99,349siri_StockIssuedDuringPeriodWarrantExercisedShares
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember 		                 
Common Stock [Member] | Liberty Media [Member]                    
Additional Stockholder's Equity (Textual) [Abstract]                    
Conversion of preferred stock to common stock (in shares)       1,293,509,076us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= siri_LibertyMediaMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember 		1,293,509,076us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= siri_LibertyMediaMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember 		         
Common Stock [Member] | December 2012 Share Repurchase Program [Member]                    
Additional Stockholder's Equity (Textual) [Abstract]                    
Stock repurchase program, authorized amount 6,000,000,000us-gaap_StockRepurchaseProgramAuthorizedAmount1
/ us-gaap_ShareRepurchaseProgramAxis
= siri_December2012ShareRepurchaseProgramMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember 		                 
Common Stock [Member] | October 2013 Share Repurchase Program [Member] | Liberty Media [Member]                    
Additional Stockholder's Equity (Textual) [Abstract]                    
Stock repurchase program, authorized amount               500,000,000us-gaap_StockRepurchaseProgramAuthorizedAmount1
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= siri_LibertyMediaMember
/ us-gaap_ShareRepurchaseProgramAxis
= siri_October2013ShareRepurchaseProgramMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember 		   
Stock repurchased and retired during period, value   160,000,000us-gaap_StockRepurchasedAndRetiredDuringPeriodValue
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= siri_LibertyMediaMember
/ us-gaap_ShareRepurchaseProgramAxis
= siri_October2013ShareRepurchaseProgramMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember 		               
Number of shares repurchased and retired   43,712,265us-gaap_StockRepurchasedAndRetiredDuringPeriodShares
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= siri_LibertyMediaMember
/ us-gaap_ShareRepurchaseProgramAxis
= siri_October2013ShareRepurchaseProgramMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember 		               
Share price (in dollars per share)           $ 3.66us-gaap_SharePrice
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= siri_LibertyMediaMember
/ us-gaap_ShareRepurchaseProgramAxis
= siri_October2013ShareRepurchaseProgramMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember 		       
Common Stock [Member] | Amended October 2013 Share Repurchase Program [Member] | Liberty Media [Member]                    
Additional Stockholder's Equity (Textual) [Abstract]                    
Stock repurchased and retired during period, value           340,000,000us-gaap_StockRepurchasedAndRetiredDuringPeriodValue
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= siri_LibertyMediaMember
/ us-gaap_ShareRepurchaseProgramAxis
= siri_AmendedOctober2013ShareRepurchaseProgramMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember 		       
Number of shares repurchased and retired           92,888,561us-gaap_StockRepurchasedAndRetiredDuringPeriodShares
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= siri_LibertyMediaMember
/ us-gaap_ShareRepurchaseProgramAxis
= siri_AmendedOctober2013ShareRepurchaseProgramMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember 		       
Common Stock [Member] | May ASR Agreement [Member]                    
Additional Stockholder's Equity (Textual) [Abstract]                    
Stock repurchase program, authorized amount                 600,000,000us-gaap_StockRepurchaseProgramAuthorizedAmount1
/ us-gaap_ShareRepurchaseProgramAxis
= siri_MayTwoThousandFourteenAcceleratedShareRepurchaseAgreementMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember 		 
Number of shares repurchased and retired 151,846,125us-gaap_StockRepurchasedAndRetiredDuringPeriodShares
/ us-gaap_ShareRepurchaseProgramAxis
= siri_MayTwoThousandFourteenAcceleratedShareRepurchaseAgreementMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember 		                 
Stock repurchase program, unused portion of authorized amount 93,596,000us-gaap_AcceleratedShareRepurchasesSettlementPaymentOrReceipt
/ us-gaap_ShareRepurchaseProgramAxis
= siri_MayTwoThousandFourteenAcceleratedShareRepurchaseAgreementMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember 		                 
Common Stock [Member] | August ASR Agreement [Member]                    
Additional Stockholder's Equity (Textual) [Abstract]                    
Stock repurchase program, authorized amount                   $ 250,000,000us-gaap_StockRepurchaseProgramAuthorizedAmount1
/ us-gaap_ShareRepurchaseProgramAxis
= siri_AugustTwoThousandFourteenAcceleratedShareRepurchaseAgreementMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
Number of shares repurchased and retired 71,316,503us-gaap_StockRepurchasedAndRetiredDuringPeriodShares
/ us-gaap_ShareRepurchaseProgramAxis
= siri_AugustTwoThousandFourteenAcceleratedShareRepurchaseAgreementMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember